WesWorld

Maia , laid down 1923, sold to Mexico 1938
Merope , laid down 1923, sold to Mexico 1938
Alkyone , laid down 1924, sold to Mexico 1938
Elektra , laid down 1924, sold to Mexico 1938
Sterope , laid down 1924, lost 27-12-35 (ramming)
Asterope , laid down 1924, sold to Mexico 1938
Taygete , laid down 1924, sold to Mexico 1938
Kaleino , laid down 1924, sunk 29-08-35 (bomb)



Displacement:
600 t light; 623 t standard; 698 t normal; 756 t full load
Loading submergence 89 tons/feet

Dimensions:
229,66 ft x 25,10 ft x 10,60 ft (normal load)
70,00 m x 7,65 m x 3,23 m

Armament:
3 - 4,13" / 105 mm guns
2 - 1,57" / 40 mm AA guns
4 - 0,79" / 20 mm guns
Weight of broadside 111 lbs / 50 kg
4 - 21,0" / 533 mm above water torpedoes

Armour:
Main gun shields 1,18" / 30 mm, AA gun shields 0,98" / 25 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 21.298 shp / 15.888 Kw = 30,75 kts
Range 4.350nm at 12,00 kts

Complement:
67 - 88

Cost:
£0,241 million / $0,964 million

Distribution of weights at normal displacement:
Armament: 14 tons, 2,0%
Armour: 5 tons, 0,7%
Belts: 0 tons, 0,0%, Armament: 5 tons, 0,7%, Armour Deck: 0 tons, 0,0%
Conning Tower: 0 tons, 0,0%, Torpedo bulkhead: 0 tons, 0,0%
Machinery: 358 tons, 51,3%
Hull, fittings & equipment: 212 tons, 30,4%
Fuel, ammunition & stores: 99 tons, 14,1%
Miscellaneous weights: 10 tons, 1,4%

Metacentric height 0,7

Remarks:
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1,05
Shellfire needed to sink: 173 lbs / 78 Kg = 4,9 x 4,1 " / 105 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0,2
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 70 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0,38
Relative quality as seaboat: 1,00

Hull form characteristics:
Block coefficient: 0,400
Sharpness coefficient: 0,31
Hull speed coefficient 'M': 7,91
'Natural speed' for length: 15,15 kts
Power going to wave formation at top speed: 73 %
Trim: 70
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 182,4%
Relative accommodation and working space: 63,1%
(Average = 100%)
Displacement factor: 45%
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0,50
(Structure weight / hull surface area: 30 lbs / square foot or 147 Kg / square metre)
Relative longitudinal hull strength: 2,61
(for 13,62 ft / 4,15 m average freeboard, freeboard adjustment 4,72 ft)
Relative composite hull strength: 0,59

Uranus , laid down 1929, sold to Mexico 1943
Saturn , laid down 1929, sold to Mexico 1943
Venus , laid down 1929, sold to Mexico 1943
Mercury , laid down 1929, sold to Mexico 1943
Jupiter , laid down 1929, sold to Mexico 1943
Mars , laid down 1929, sold to Mexico 1943
Neptune , laid down 1930, sold to Mexico 1943
Pluto , laid down 1930, sold to Mexico 1943



Displacement:
576 t light; 607 t standard; 678 t normal; 735 t full load

Dimensions: Length overall / water x beam x draught
229,66 ft / 223,10 ft x 25,10 ft x 10,60 ft (normal load)
70,00 m / 68,00 m x 7,65 m x 3,23 m

Armament:
4 - 4,13" / 105 mm guns (2x2 guns), 35,32lbs / 16,02kg shells, 1929 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread
4 - 1,57" / 40,0 mm guns (2x2 guns), 1,95lbs / 0,89kg shells, 1929 Model
Breech loading guns in deck mounts
on side, evenly spread
4 - 0,79" / 20,0 mm guns in single mounts, 0,24lbs / 0,11kg shells, 1929 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 150 lbs / 68 kg
Shells per gun, main battery: 200
4 - 21,0" / 533 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0,79" / 20 mm 0,59" / 15 mm -
3rd: 0,59" / 15 mm - -
4th: 0,39" / 10 mm - -

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 18.766 shp / 14.000 Kw = 31,40 kts
Range 4.800nm at 12,00 kts
Bunker at max displacement = 127 tons

Complement:
66 - 86

Cost:
£0,325 million / $1,300 million

Distribution of weights at normal displacement:
Armament: 19 tons, 2,8%
Armour: 9 tons, 1,3%
- Belts: 0 tons, 0,0%
- Torpedo bulkhead: 0 tons, 0,0%
- Armament: 9 tons, 1,3%
- Armour Deck: 0 tons, 0,0%
- Conning Tower: 0 tons, 0,0%
Machinery: 324 tons, 47,7%
Hull, fittings & equipment: 215 tons, 31,7%
Fuel, ammunition & stores: 102 tons, 15,0%
Miscellaneous weights: 10 tons, 1,5%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
198 lbs / 90 Kg = 5,6 x 4,1 " / 105 mm shells or 0,2 torpedoes
Stability (Unstable if below 1.00): 1,19
Metacentric height 0,9 ft / 0,3 m
Roll period: 11,4 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0,33
Seaboat quality (Average = 1.00): 0,75

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0,400
Length to Beam Ratio: 8,89 : 1
'Natural speed' for length: 17,45 kts
Power going to wave formation at top speed: 75 %
Trim (Max stability = 0, Max steadiness = 100): 67
Bow angle (Positive = bow angles forward): 20,00 degrees
Stern overhang: 0,00 ft / 0,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 18,04 ft / 5,50 m
- Forecastle (20%): 16,08 ft / 4,90 m
- Mid (48%): 16,08 ft / 4,90 m (8,20 ft / 2,50 m aft of break)
- Quarterdeck (15%): 8,20 ft / 2,50 m
- Stern: 8,20 ft / 2,50 m
- Average freeboard: 12,14 ft / 3,70 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 177,6%
- Above water (accommodation/working, high = better): 60,9%
Waterplane Area: 3.577 Square feet or 332 Square metres
Displacement factor (Displacement / loading): 51%
Structure weight / hull surface area: 27 lbs/sq ft or 133 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,50
- Longitudinal: 4,31
- Overall: 0,62
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Buzzard, laid down 1935
Goshawk , laid down 1935
Swallow , laid down 1935
Mohawk , laid down 1936
Eagle , laid down 1936
Kestrel , laid down 1936
Red Kite , laid down 1936
Sparrow , laid down 1937



Displacement:
714 t light; 761 t standard; 865 t normal; 948 t full load

Dimensions: Length overall / water x beam x draught
253,82 ft / 246,06 ft x 26,90 ft x 11,15 ft (normal load)
77,37 m / 75,00 m x 8,20 m x 3,40 m

Armament:
4 - 4,53" / 115 mm guns (2x2 guns), 46,40lbs / 21,05kg shells, 1935 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread
8 - 1,57" / 40,0 mm guns (3 mounts), 1,95lbs / 0,88kg shells, 1935 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
6 - 0,79" / 20,0 mm guns (4 mounts), 0,24lbs / 0,11kg shells, 1935 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 203 lbs / 92 kg
Shells per gun, main battery: 250

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1,38" / 35 mm 0,98" / 25 mm -
3rd: 0,59" / 15 mm - -
4th: 0,39" / 10 mm - -

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 21.447 shp / 16.000 Kw = 31,61 kts
Range 6.500nm at 12,00 kts
Bunker at max displacement = 187 tons

Complement:
79 - 103

Cost:
£0,519 million / $2,075 million

Distribution of weights at normal displacement:
Armament: 25 tons, 2,9%
Armour: 15 tons, 1,7%
- Belts: 0 tons, 0,0%
- Torpedo bulkhead: 0 tons, 0,0%
- Armament: 15 tons, 1,7%
- Armour Deck: 0 tons, 0,0%
- Conning Tower: 0 tons, 0,0%
Machinery: 397 tons, 45,9%
Hull, fittings & equipment: 262 tons, 30,2%
Fuel, ammunition & stores: 151 tons, 17,5%
Miscellaneous weights: 15 tons, 1,7%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
241 lbs / 109 Kg = 5,2 x 4,5 " / 115 mm shells or 0,2 torpedoes
Stability (Unstable if below 1.00): 1,12
Metacentric height 0,9 ft / 0,3 m
Roll period: 12,1 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0,41
Seaboat quality (Average = 1.00): 0,84

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0,410
Length to Beam Ratio: 9,15 : 1
'Natural speed' for length: 18,25 kts
Power going to wave formation at top speed: 73 %
Trim (Max stability = 0, Max steadiness = 100): 84
Bow angle (Positive = bow angles forward): 20,00 degrees
Stern overhang: 0,00 ft / 0,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21,33 ft / 6,50 m
- Forecastle (25%): 16,73 ft / 5,10 m
- Mid (45%): 16,73 ft / 5,10 m (8,86 ft / 2,70 m aft of break)
- Quarterdeck (15%): 8,86 ft / 2,70 m
- Stern: 8,86 ft / 2,70 m
- Average freeboard: 12,86 ft / 3,92 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 174,1%
- Above water (accommodation/working, high = better): 117,8%
Waterplane Area: 4.255 Square feet or 395 Square metres
Displacement factor (Displacement / loading): 60%
Structure weight / hull surface area: 28 lbs/sq ft or 138 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,50
- Longitudinal: 3,72
- Overall: 0,61
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather